Product Name | Multi-parameter pH mV DO/dissolved oxygen Meter |
Types | Tablet pH/mV/DO meter |
Brand | PEAK INSTRUMENTS |
Model | L521 |
Display | 5 inch LCD. |
Measurement range | (-2~19.99)pH |
Resolution | 0.1/0.01pH |
Accuracy | ±0.02pH |
Stability | ±0.01pH/3h |
Temperature range | 0℃~100℃ |
Temperature compensation | 0~100℃ |
mV range | -1999.9mV~1999.9mV |
mV resolution | 1mV |
Calibration | 1, 2, 3 points |
DO Range | 0.00 ~ 20 mg/L (ppm) |
Resolution | 0.01/0.1 |
DO Accuracy | ±0.3% |
DO Saturation | 0.0 ~ 200% |
Saturation Resolution | 0.1% |
Saturation Accuracy | ±2.0%FS |








1. Produce main board | 2.Connect the cables for main board | 3. Install screen display | 4. Install lithium battery |


5.Install front frame | 6.Assemble rear shell |




7. Adjust panel and buttons | 8. Install touch panel | 9. Upload software | 10. Final assembly and calibration |











Office and workshop buildings, factory was built up in 2006 | ||||||||





